Assessment of right ventricular function by strain rate imaging in chronic obstructive pulmonary disease

Abstract

The purpose of the current study was to compare right ventricular (RV) myocardial wall velocities (tissue Doppler imaging) and strain rate imaging (SRI) parameters with conventional echocardiographic indices evaluating RV function in chronic obstructive pulmonary disease (COPD) patients.In total, 39 patients with COPD and 22 healthy subjects were included in the current study. Seventeen patients had pulmonary artery pressure ,35 mmHg (group I) and 22 patients had pulmonary artery pressure .35 mmHg (group II). Tissue Doppler imaging, strain and strain rate (SR) values were obtained from RV free wall (FW) and interventricular septum. Respiratory function tests were performed (forced expiratory volume in one second/vital capacity (FEV1/VC) and carbon monoxide diffusion lung capacity per unit of alveolar volume (DL,CO/VA)).Strain/SR values were reduced in all segments of group II patients compared with group I patients and controls with lowest values at basal FW site. A significant relationship was shown between peak systolic SR at basal FW site and radionuclide RV ejection fraction. A significant relationship was shown between peak systolic SR at basal FW site and DL,CO/VA and FEV1/VC.In conclusion, in chronic obstructive pulmonary disease patients, strain rate imaging parameters can determine right ventricular dysfunction that is complementary to conventional echocardiographic indices and is correlated with pulmonary hypertension and respiratory function tests.

Doppler-derived strain and strain rate imaging assessment of right ventricular systolic function in adults late after tetralogy of Fallot repair: an observational study

“…It is deserving of note that echocardiography is deemed an inaccurate tool for the quantitative assessment of the RV function because of a lack of an ideal geometric model for the evaluation of ventricular volumes (22,23).The major potential advantages of strain and SR imaging for the assessment of the RV function are the independence of geometric assumptions and endocardial border tracing. In addition, both strain and SR images are feasible in the majority of patients (even in the presence of low-quality 2-D imaging), reproducible, and relatively load and rate independent (24)(25)(26). Both techniques also permit the quantification of the longitudinal systolic function for each RV segment separately.…”

“…Cut-off points of systolic strain and peak SR at the basal RVFW of 25% and −4 sec−1 have been previously suggested for a preserved global RV systolic function (RVEF≥50%) with sensitivities of 81% and 85% and specificities of 82% and 88%, respectively (25,26). In our study, the mean of the RVED index (158±47.8 cc/m 2 ) in CMR was also increased and the RVEF by CMR (38±8%) was reduced in most of our patients.…”

Analyse échocardio-graphique du ventricule droit

“…Le strain normal est de 19 ± 6 % en basal, de 27 ± 6 % en médian et de 32 ± 6 % en apical [11]. Chez les patients suivis pour HTAP [14], ou pour BPCO (bronchopneumopathie chronique obstructive) avec HTAP (>35mmHg) [15], les valeurs de strain sont diminuées comparativement à un groupe contrôle. Cela étant, l'analyse du VD par strain et strain rate présente des limites.…”

Equine myocardial right ventricular ouflow tract function in horses with RAO

“…In der Humanmedizin finden sowohl die Farbgewebedopplertechnik (Farbkodierung des Myokards) als auch die zweidimensionale "Speckle Tracking" Methode (Graustufenanalyse) Eingang in die Diagnostik, Therapieüberwachung und Prognose von sekundären Rechtsherzerkrankungen (Vonk-Noordegraaf et al 2005, Melek et al 2006, Vitarelli et al 2006, Huez et al 2007, Turhan et al 2007, Tayyareci et al 2009). Alle Parameter der Verformung des Myokards mittels Gewebedoppler beruhen dabei auf der Verkürzung der Sarkomere durch elektromechanische Erregung während der Systole (Voigt 2007 Die Gewebedopplertechnik mit der Analyse der Myokardbewegung (Richtung und Geschwindigkeit) wurde beim Pferd bis jetzt lediglich auf den linken Ventrikel angewandt (Gehlen et al 2009a, Schwarzwald et al 2009).…”